Function useQuery

Apollo-style query hook — auto-fetches on mount, re-fetches when reactive config changes. Returns { data, loading, failure, refetch, cancel }.

data is the parsed response body (not the full FetchResponse). failure narrows on kind: 'transport' (no response exists — abort, timeout, connection lost) carries error: FetchError; 'http' (server answered outside 2xx) carries response, the resolved ok-false FetchResponse.

const { data, loading, failure } = useQuery<User[]>(api, '/users', {
    reactive: { params: { page: 1 } },
});

if (failure?.kind === 'transport') return <Error message={failure.error.message} />;
if (failure?.kind === 'http') return <Error status={failure.response.status} />;